Oil-burner.



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RICHARD FRAKIJN SCIIROEDER, CF SACRAMENTO, CALIFORNIA.

OIL-BURNER.

SPCIFICATIONformng-g part of Letters Patent No. 724,053, dated March 31, 1903.

Application filed September 28, 1901. Serial No. 76,913. (No model.)

To all 10h/mn, t-'infty concern.-

Be it known that I, RICHARD FRANKLIN SCHROEDER, a citizen of the United States, residing at Sacramento, in the county of Sacramento and State of California, have .invented a new and useful Oil-Burner, of which the following is a speciticatiol.

This invention relates to oil-burners, and has for its object to effect a thorough and efficient mixing of oil yand steam in a simple and inexpensive manner prior to the point of ig- ,nition and also to provide for conveniently Another object resides in the provision ofan adjustable connection between the inner and outer shells, so as to permit of a tightening of the joint without rotating either of the shells.

Vith these and other objects in view the present invention consists in the combination andai-rangement of parts, as will be hereinafter more fully described, shown in the.

accompanying drawings, and particularly pointed ont in the appended claims, it being understood that changes in the form, proportion, size, and minor details may be made within the scope of the claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings, Figure l is a central longitudinal sectional view ofvan oil-burner constructed and arranged in accordance with the prescntinvent-ion. Fig, 2 is a detail perspective view of the mixing device. Fig. 3 is a detail perspective view of the burner-tip.

Like characters of reference designate correspondingparts in all the figures of the drawings.

Referring to the accompanying drawings, 1l designates an open-ended tubular casing or external shell, which is internally and externally screw-threaded at its outer end and also provided at its opposite end with a reduced longitudinallyprojected cylindrical flange 2, which .is externally and internally screw-threaded, there being an inner annular Harige-3 located at the inner end of the cy- `6, forming a valve-seat, from which a comt paratively small port 7 opens outwardly through the end of the tube. The rear end of the oil-tube is provided with an enlarged head portion S, the forward end of which is reduced by means of ya circular `rabbet 9, the back of which is provided with a marginal groove 10.

'lo edect the connection between the inner end of the outer shell and the head of the innersliell, there is provided a sleeve or tubular coupling l1, which is swiveled to the head by having one end rotatably received within the groove or rabbet 9 and provided with two or more set-screws l2, piercing the coupling and slidably engaging the groovelO, so as to permit of rotation of the coupling, the opposite end of the latter being internally screw-threaded to fit the external screwthreaded portion of the flange 2 or adjacent end of the outer shell.

After the inner tube and the head portion S have been properly fitted to the external against the head S, so as to prevent accidental turning thereof, and thereby etlectually interlock the inner and outer tubes or shells.

Should it be desirable to withdraw the inner tube, this may be done without interfering with any of the other parts of the burner by withdrawing thc set-screws .12 entirely from the groove l0 in the head S, whereby the inner tube is free to be moved outwardly.

It will here be observed that in assembling the inner and outer shells the inner tube is inserted inwardly through the inner end of the outer shell and through the guide-opening formed by the marginal flange 3 until the coupling-sleeve 1l engages the screw-threaded cylindrical fiange 2, after which the sleeve is rotated to draw the two members together without requiring rotation of either member. In order that a tight joint may be effected betube creasing l the set-crews l2 are set snugly IOO nel' marginal flange 3, and a metallic gland 13 is then screwed into the cylindrical flange,V

so as to hold the packing-ring tightly in place and snugly against the inner tube or shell.

The outer end portion of the head 8 is provided with a lateral and internally-screwtlireaded nipple 14, which is in communication with the interior of the member and is designed for connection with an oil-supply. An internally-screw-threaded casingor cylindrical extension 15 is provided in longitudinal alinement with the bore of the inner tube and receives the screw-threaded stem portion 1G of a needle-valve 17, the inner pointed end of which is designed to control the outlet-port 7 of the inner oil-tube. A suitable stuffing-box 18 is applied tothe outer end of the extension or casing, and a hand-wheel 19 is carried bythe outer end of the Valve-stem, whereby the latter maybe conveniently controlled.

From the foregoing description it is apparent that the oil is fed through the inner tube and the steam is fed through the annular space su rrounding' the .oil-tube and between. the latter and the outer shell, and therefore it becomes necessary to thoroughly mix the steam and the oil before the latter is ignited, and to accomplish this result there is provided a mixing device in the form of a flat disk 20, which is externally screw-threaded and is fitted into the outer or forward end of the outer shell to form a closure therefor and is provided atjits inner side with a central conical stud or projection 2l, the .apex of which normallytlies at or adjacent to the outer end of the oil-tube, so as to for'm a spreader or defieetor for-the'oil as it escapes from the` tube. The outer faceof this disk is provided with a polygonal projection 22, which is designed to form a wrench seat o1' head whereby the device may be conveniently applied and removed and also adjusted to vary the distance between the conicaldefiector and the discharge end of' the oil-tube; A plurality of perforations 23 are formed through the disk and are located iu a marginal series surrounding the conical projection and are tapered outwardly, the inner ends of the openings occupying .substantially the 4space between the base ofthe conical projection and the inner wall of. the outer shell, so that there may be no projections to interfere with the free escape of the mixed steam and oil, and thereby to obviate any dead steam-space. Furthermore, this tapered shape of the openings produces jets, so as to spray or atomize the discharged fluid.

Itwill here be noted that the space bounded by the projected forward end of the outer tube or shell and between the forward end of the inner tube 0,1' shell 5 and the disk 20 forms a mixing-chamber which embraces the oilspreading device 21, wherefore it is apparent that the oil and the steam are thoroughly mixed before they pass through the perforations 23 in the disk which closes the outerend of the mixing-chamber, and ignition of the fuel does not take place until it has passed to a considerable distance beyond the mixing-chamber-that is to say, at the outer end of the nozzle 24. Moreover, the nozzle 2t is entirely separate from the mixer20, and therefore may be adjusted independently of each other, the nozzle embracing the exterior of the outer shell or casing and the mixer being fitted to the interior of said shell or casing.

A tubular burner-tip 2i is fitted to the externally-screw-threaded forward end of the outer shell and has an outer flattened conical terminal 25 to produce a narrow slit-like discharge-opening, which results in a fan-like discharge of the fluid where the latter is ignit'ed and is formed into a flame.v

From the foregoing description it is appar-- ent that the present device embodies but comparatively few parts, which are com pactly as setnbled and' may be conveniently removed for purposes of cleansing and replacement should any of the parts become damaged. Moreover, by reason of' the improved mixing device the oil and steam are eifectually intermingled in asim ple and economic manner, so as to insure an intense flame at the outer end of the burner-tip. The mixing device may also be adjusted toward and away from the oil-t'ube,tso as to accommodate for all conditions of the burner, andthe means for coutrolling the supply of oil is entirely independent of the mixing device, so that neither of these parts depends in any manner upon the other.

What I claim is- 1, A burner ofthe characterdescribed havingan outersteam-tube,an inneroil-tubehaving its discharge end terminated short; of the corresponding end of the outer tube, the space within the projected end of the outer tube and between the forward ends of the tubes forming a mixing-chamber, andan oil-spreading device having an adjustable screw-threaded connection with the projected end portion of the outer tube, and provided with an inner conical defiector located within the mixingchamber in co'iperative relation to the adjacent end of the inner tube. A

2. In an oil-burner, the combination with inner and outer tubes or shells, the forward ondy of the inner tube being terminated short of the'forward end of the outer tube, and the space within the projected end of the outer tube and between the forward ends of the two tubes forming a mixing-chamber, of a spreading device closing the outer end of the mixingchamber-with a portion projected into said chamberand adjustable toward and away from the point of discharge of the inner tube,

and a nozzle carried by the outer tube independently of the spreading device and also projected outwardly beyond the latter.

3. in an oil-burner. the combination with of -the forward end of the outer tube, and the space within the outer tube and between the forward ends of the two tubes forming a mixing-chamber, ot a spreading device mounted within the projected end of the outer tube and closing the outer end ot' the mixing-chamber with a portion projected into said chamber and adjustable toward and away from the point of discharge of the inner tube,'and a nozzle extended from the outer tube and independent of the spreading device.

4. In an oil-burner, the com-bination of an 1liner oil-tube, an outer steam-tube projected beyond the inner tube,'tbe space bounded by the projected end of the outer tube and between the forward ends of the two tubes fortning a mixing-chamber, an oil-spreading device titted to theinner walls of the outer projected end portion of the outer tube and closing the saine, said oil-spreading device having perforations for the escape of the fuel and an oil-spreading projection which is embraced by the mixing-cham ber, the spreading device being adjustable in the mixing-chamber toward and away,1 from thedischarge end of the inneroil-tube, and a nozzle which is independent of the spreading device and is carried by the exterior of the projected end of the outer tube.

5. A burner of the character-described, havingan outersteam-tube, an inner oil-tube having its discharge end terminated short of the between the en'dsof the two tubes forming a mixing-chamber, and an oil-spreading device consisting of a disk adjustably screwed into the discharge end of the outer tube and provided upon its inner side with a conical spreading projection located within the mixingchamber, a `wrench-seat. upon its outer side, and a plurality'ot perfor-ations formed through the disk and surrounding the base of the conical projection.

6. In an oil-burner, the combination of an inner oil-tube having a controlling-valve, an external steam-tube surrounding the same, a mixing-chamber iu communication with the discharge ends ofthe two tubes, and a spreading device comprising a disk located within the mixing-chamber and adjacent to and externally of the discharge cud of the inner tube and adj ustably screwed into the discharge end ofthe outer tube to permit of adjustment of the mixer toward and away from the oiltube, and av conical projection carried by the inner face of the disk and extended toward and disposed concentrically with respect to the discharge end of the oil-tube, the disk also being provided with porforations surrounding the base of the projection and tapered outwardly.

7. As a new article of manufacture, a spreading device for oil-burners, comprising adisk having an externally-scrow-threaded peripheral edge, a reduced central Vconicalshaped projection on one side of the disk, a

reduced polygonal wrench projection on the opposite4 side of the disk, and perforations surrounding the base of the conical projection and tapered toward the wrench projection side of the disk.

8. Aburner of the characterdescribed comprising inner and outer tubes spaced apart to provide an intervening passage, the inner tube being projected beyond the outer tube and having an external annular groove in its projected portion, the adjacent end of the outer tube being externally screw-threaded,

a packing embracing the inner tube and interposed between the same and the outer tube, a gland embracing the inner tube and extending between the same andthe outer tube and engaging the packing, an interiorly-threaded sleeve embracing the grooved portion of the inner tube and engaging the threaded portion of the outer tube, and an adjustable fasteuing device piercing the sleeve and engaging the groove, substantially as described.

9. A burner of the character described comprising. inner and-outer tubes spaced apart to provide an intervening passage, the inner tube being projected beyond the outer tube and having an external annular groove in its projected portion, the adjacent end of the outer tube being externally and internally screw-threaded and provided with an inner annular flange, packing embracing the inner v tube and lyiugagainst the ange, a gland interposed between the inner and outer tubes and engaging the packing and provided with external screw-threads to eugagethe internally-screw' -.threaded portion of the outer tube, an interiorly-threaded sleeve embracingr the grooved portion of the inner tube and engaging the external screw-threads of the outer tube, and an endwise-adjustable fastening device piercing the sleeve and engaging the groove, substantially as and for ,the purpose described.

10. An oil-burner having inner and outer tubes, of which the forward end of the outer tubeis projected beyond the forward end of the inner tube and the rear end of the inner tube is projected beyond the rear end of the outer tube, the space within the forward end of the outer tube and between the forward ends of the two tubes forming a mixing-chamber, an oil-spreading -device within the mixing-chamber, and a coupling-sleeve swiveled upon the rear end of one of the tubes and having a detachable screw-threaded connec` RICHARD FRANKLIN SCIIROEDER. v

Witnesses:

M. A. Gn'r'r, M D. CorFMAN.

IIC 

